diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/parisc/eisa_eeprom.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/parisc/eisa_eeprom.c')
-rw-r--r-- | drivers/parisc/eisa_eeprom.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/parisc/eisa_eeprom.c b/drivers/parisc/eisa_eeprom.c new file mode 100644 index 000000000000..3a1b4826e5c1 --- /dev/null +++ b/drivers/parisc/eisa_eeprom.c | |||
@@ -0,0 +1,134 @@ | |||
1 | /* | ||
2 | * EISA "eeprom" support routines | ||
3 | * | ||
4 | * Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org> | ||
5 | * | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU General Public License as published by | ||
9 | * the Free Software Foundation; either version 2 of the License, or | ||
10 | * (at your option) any later version. | ||
11 | * | ||
12 | * This program is distributed in the hope that it will be useful, | ||
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
15 | * GNU General Public License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU General Public License | ||
18 | * along with this program; if not, write to the Free Software | ||
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
20 | */ | ||
21 | |||
22 | #include <linux/module.h> | ||
23 | #include <linux/init.h> | ||
24 | #include <linux/kernel.h> | ||
25 | #include <linux/miscdevice.h> | ||
26 | #include <linux/slab.h> | ||
27 | #include <linux/fs.h> | ||
28 | #include <asm/io.h> | ||
29 | #include <asm/uaccess.h> | ||
30 | #include <asm/eisa_eeprom.h> | ||
31 | |||
32 | #define EISA_EEPROM_MINOR 241 | ||
33 | |||
34 | static loff_t eisa_eeprom_llseek(struct file *file, loff_t offset, int origin ) | ||
35 | { | ||
36 | switch (origin) { | ||
37 | case 0: | ||
38 | /* nothing to do */ | ||
39 | break; | ||
40 | case 1: | ||
41 | offset += file->f_pos; | ||
42 | break; | ||
43 | case 2: | ||
44 | offset += HPEE_MAX_LENGTH; | ||
45 | break; | ||
46 | } | ||
47 | return (offset >= 0 && offset < HPEE_MAX_LENGTH) ? (file->f_pos = offset) : -EINVAL; | ||
48 | } | ||
49 | |||
50 | static ssize_t eisa_eeprom_read(struct file * file, | ||
51 | char *buf, size_t count, loff_t *ppos ) | ||
52 | { | ||
53 | unsigned char *tmp; | ||
54 | ssize_t ret; | ||
55 | int i; | ||
56 | |||
57 | if (*ppos >= HPEE_MAX_LENGTH) | ||
58 | return 0; | ||
59 | |||
60 | count = *ppos + count < HPEE_MAX_LENGTH ? count : HPEE_MAX_LENGTH - *ppos; | ||
61 | tmp = kmalloc(count, GFP_KERNEL); | ||
62 | if (tmp) { | ||
63 | for (i = 0; i < count; i++) | ||
64 | tmp[i] = readb(eisa_eeprom_addr+(*ppos)++); | ||
65 | |||
66 | if (copy_to_user (buf, tmp, count)) | ||
67 | ret = -EFAULT; | ||
68 | else | ||
69 | ret = count; | ||
70 | kfree (tmp); | ||
71 | } else | ||
72 | ret = -ENOMEM; | ||
73 | |||
74 | return ret; | ||
75 | } | ||
76 | |||
77 | static int eisa_eeprom_ioctl(struct inode *inode, struct file *file, | ||
78 | unsigned int cmd, | ||
79 | unsigned long arg) | ||
80 | { | ||
81 | return -ENOTTY; | ||
82 | } | ||
83 | |||
84 | static int eisa_eeprom_open(struct inode *inode, struct file *file) | ||
85 | { | ||
86 | if (file->f_mode & 2) | ||
87 | return -EINVAL; | ||
88 | |||
89 | return 0; | ||
90 | } | ||
91 | |||
92 | static int eisa_eeprom_release(struct inode *inode, struct file *file) | ||
93 | { | ||
94 | return 0; | ||
95 | } | ||
96 | |||
97 | /* | ||
98 | * The various file operations we support. | ||
99 | */ | ||
100 | static struct file_operations eisa_eeprom_fops = { | ||
101 | .owner = THIS_MODULE, | ||
102 | .llseek = eisa_eeprom_llseek, | ||
103 | .read = eisa_eeprom_read, | ||
104 | .ioctl = eisa_eeprom_ioctl, | ||
105 | .open = eisa_eeprom_open, | ||
106 | .release = eisa_eeprom_release, | ||
107 | }; | ||
108 | |||
109 | static struct miscdevice eisa_eeprom_dev = { | ||
110 | EISA_EEPROM_MINOR, | ||
111 | "eisa_eeprom", | ||
112 | &eisa_eeprom_fops | ||
113 | }; | ||
114 | |||
115 | static int __init eisa_eeprom_init(void) | ||
116 | { | ||
117 | int retval; | ||
118 | |||
119 | if (!eisa_eeprom_addr) | ||
120 | return -ENODEV; | ||
121 | |||
122 | retval = misc_register(&eisa_eeprom_dev); | ||
123 | if (retval < 0) { | ||
124 | printk(KERN_ERR "EISA EEPROM: cannot register misc device.\n"); | ||
125 | return retval; | ||
126 | } | ||
127 | |||
128 | printk(KERN_INFO "EISA EEPROM at 0x%p\n", eisa_eeprom_addr); | ||
129 | return 0; | ||
130 | } | ||
131 | |||
132 | MODULE_LICENSE("GPL"); | ||
133 | |||
134 | module_init(eisa_eeprom_init); | ||